Earth is actually very special for it's unique structure which supports such a diverse group of life. We are a hub of activity in a forgotten backwater part of the universe that has thrived in spite of our circumstances. In the big picture, that of the universe, there is no other planet that is structured like Earth and is able to accommodate so much life in the variety and abundance of our planet. When you consider the number of planets and other celestial structures, we are exceedingly rare and it is understandable that we are the focus of so many off-worlders.
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